This seemed to be more of a 'tying up the themes left open from the first film' exercise, with a load of retro-fitted, minor superheroes thrown in with powers allocated that conveniently help get the flimsy story to a close.
Good to see the old characters again, but when you compare it to the original film, the plot, the side stories, the characters & the 'heart' are all a bit lacking. It just felt a bit glib, throwaway & rushed.
I know we've been spoilt rotten by dozens of superhero films between the original & the sequel, & keeping that level of awe was always going to be difficult (with every film 'super', no film will be...), but this felt like so many Disney 'straight to video' sequels.
The makers should've taken notes from the first film's director's commentary.